Thread-cutter for looms



L. JOURDAIN.

THREAD CUTTER FOR LOOMS.

APPLICATION FILED JUNE 21. I920.

Patented Oct. 11, 1921.

2 SHEETS-SHEET 2. llE..:1

J L24 X x315 J7 I 3%, V6 atto zwugo *IU NITE D STATES PATENT "OFFICE;

THREAD-CUTTER roe LOOMS.

Application filed June 21,

T call whom it may concern:

Be it known that 1 Louis JoURDAiN, a citizen of the United States, residing at Lowell, in the county of Middlesex and State of Massachusetts, have invented certain new and useful Improvements in Thread-Cutters for Looms; and I do declare the following to be aIfull,'-elea'r; and exact description of the invention, such as will enable others skilled in the art to which. it appeitains to make and use the same. I I

v This invention relates to an improved thread cutter for use in connection with a .loom and one object of the invention is to 15 provide the thread cutter'with an improved construction of knife carryingarmand improved means for mounting the arm, the mounting for the arm' including a rocker shaft and an actuating lever adapted for engaging an abutment normally held out of position for engagement by the lever.

Another object of the invention is to so construct and mount the knife carrying bracket armlthat itinay be adjusted to the proper position and releasably held in the set position. I

Another object of the invention is .to provide an improved means for mounting, the abutment arm which is normally retained in an inoperative position and moved to an operative position by a spring. a

Another object of the invention is to so mount this'abutment arm that it may be freely moved by the spring but movement of this springlimited through the medium of an adjustably mounted stop.

Another object of the invention is to provide an improved type of block carrying plunger, the plunger being slidably mounted and yieldably held in a normal position with the block carried thereby extending for engagement by the thread cutting blade.

Another object of the invention is to so construct the elements forming the thread cutting mechanism that they may be associated with a conventional construction of loom. I II v Thisinventioaisillustrated in the accompanyingdrawings, wherein: I

Figure 1 is a fragmentary sectional view through a portion of a'lo'orn of a convent-ional construction and showing the imroved thread cutting mechanism connectedtherewith and shown in side elevation,

Specification of Lctte'rs ratent. Patented Oct. 11, 1921.

1920. Serial No. 390,452.'

shown in Fig. 1, the reed being shown in section, I I

Fig. 3 is a sectional view taken along the line 3-3 of Fig. 1,

Fig. 4: isa-perspectiye view of that portion of the improved device'mount'ed upon the laybeam',

Fig. 5 is a perspective view of the bracket and block carrying plunger mounted upon the breast beam,

Fig. 6 is aperspective view of the abutment arm and mounting for the same, and I Fi 7 is a sectional view taken along the line 71-7 of Fig. 3. I

This improved thread cutting device is used in connection with a conventional construction of loom which includes abreast beam 1 lay beam 2, hand rail 3 and reed 4. A rocker shaft 5 is rotatably mounted in bearings 6 and extends longitudinally beneath the lay beam 2. This rocker shaft carries a U-shaped bracket arm which is mounted upon the rocker shaft as shown clearly in Fig. 4 and releasably held in" a set position thereon by the set screw 8. The arm 9' of this bracket 7 extends transversely beneath the lay beam and carries a screw 10 which forms an abutment or stop for engaging the under face of the lay beam, a locking nut 11 being mounted upon this'screw so that the screw may be securely held in a set position. The shorter arm 12 of this bracket extends above the lay beam and has its free end portion bifurcated to receive the cutting blade 13. This cutting blade is held in place'by thefasteners 14 which may be removable so that the blade may be removed and sharpened when necessary. A block '15, is mounted upon the rocker shaft 5 and provided with a tongue extension 16 with which a lever 17 is connected by fasteners 18 and this lever 17 is provided witha depending free end portion which carries an abutment'pin 19 by means of which the lever may be swung to rotate the shaft 5 and thus swing the bracket 7 to move the cutting blade 13 though-the reed. I I c In order to carry the block 20 against whichthe thread will be cutby the blade 13,

there has'been provideda plunger 21 which stem 23 extending through an opening formed in the arm 25 of the .bracket 24 and the plunger extending between the fingers 26 of the arm 27 and beneath the securing pins 28 which may carry a roller sleeve 28'. Side arms 29 are provided to llmltl sliding V movement of the plunger and a spring 30 is provided to yieldably retain the plunger in the positionshown in Fig. 5. When the bracket 24 is secured upon the breast beam mits the. plunger to move after the block is engaged by the knife and thus-prevent'break.

ing of any of the parts when the device is in use. Y

In order to permit the lever 17 to be moved to rotatethe rocker shaft,- there has- 7 beenprovided an abutment strip 33 which is pivotally connected with the supporting bar 34 by a securing bolt '35 and nut 36. This bolt 35 extends through a slot 37 Iformed longitudinally in the bar 34and has its .head seated in the longitudinally extending seat 38'cut from the inner face of the bar as shown in Figs. 6 and 7. A spring 39 has its upper end connected with one of the fastener bolts or screws 40 which pass through the openings'41 in the end portions of the bar 34 and this. spring has its lower end secured in the opening 42 at the side of the strip 33. It will thus be seen that the spring will tend to return the strip 33 to the position shown in Figs. 31 and 6 when the chain or line 43 is released. This chain 43 extends for engagement with the usual mechanism provided upon looms for holding abutments of this type out of the operative position. A bolt 44 which is similar to the bolt 35 is passed through the slot37 and carries a securing nut 45 which engages a washer 46. This washer 46 is provided with a pin extension 47 which extends as shown and has its free end portion bent outwardly for engaging the side edge of the strip 33 .and thus limiting movement of the strip under action of the spring 39. Therefore, the abutment strip can be prevented from moving beyond the vertical position when drawn by this spring, or it may be stopped in an inclined position if desired.

When'this device is in'use, it is assembled as shown and the chain 43 will be drawn upon to move the abutment strip 33 to the dotted line position of Fig. 3. The lay beam can'then have movement toward the abutment strip 33. When the thread is to be cut, the chain is automatically released in the usual manner, and the spring 39 will move the abutment strip to the position shown in Fig. 3 thus placing this strip in tate the rocker shaft and swing the bracket and will cut the thread against the block 20, the plunger 21 moving against the action of the spring 30 so-that none of the parts will be broken. If it is found that the bracket is not, in the proper position, the set screw 8' can be "loosened and the bracket placed at the proper angle and the set screw then tightened. The abutment bolt 1Q may also be adjusted .so that it will properly engage thev underfaceof the lay beam 2 when the device is in the operative position and thus insureproper-positioning of arm 17 when the device is in'the operative position.

There has thus been prov-idedi'a thread cuttingmechanism which is so constructed and assembledithat it maybe properly adjusted incase' it does not properly cut the thread. r ,What is'claimed is;

1. The combination with a loom structure including abreast beam,- a lay beami and ,a reed, of a rocker shaft rotatably mounted beneath the lay beam, a U-shaped bracket 4. The knife 13 will move through the reed having a lowerarm provided withian' open- 7 ing receivingthe rocker shaft, means to releasablylock the bracket upon the rocker shaft, an adjusting screw carried by the. lower arm for engaging the lay beam and,

abutment connected with the breast beam and movable into vand out'of an operative position, a lever arm mounted upon the rocker shaft, and an abutment carried by the lever arm for engaging the abutment of'the breast beam and swinging the lever to rotate the rockershaft and move the blade carried by said bracket through the reed into engagement with the block when the abutment of the" breast beam .is in an operative position.

2. The combination with a loom structure including a breast beam, a lay'beam, and

a reed, of a cutting element movably asso elated with the lay beam and including an actuating leverhaving a side pin, a supporting strip connected with the breastbeam and having a longitudinally extending slot, an

abutment strip, asecuring screw extending through the slot of the supporting strip. and through an opening formed in the upper end portion of the abutment strip to adjustably and pivotally connect the abutment strip with the supporting strip, a spring yieldably retaining the abutment strip in an operative position for engagement with the abutment pin of said lever, and means for swinging the abutment strip out of the operative position.

3. The combination with a loom structure including a breast beam, a lay beam and a reed, of a cutting element movably connected with a lay beam for movement through the reed, and including an actuating lever, a pressure block carrying element connected with the breast beam in operative relation to the cutting element, and an abutment element connected With the breast beam and including a supporting strip, an

abutment strip slidably and pivotally connected with the supporting strip, a stop con nected with the supporting strip for engaging the abutment strip and limiting swinging movement in one direction, resilient means yieldably retaining the abutment strip in an operative position for engagement with the lever of the cutting element, and means for moving the abutment strip out of the operative position.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

LOUIS JOURDAIN. Witnesses:

THOMAS S. CROWLEY. ESTHER MOMAHON. 

